Smoot Type 4 Airlocks

Smoot Type 4 Airlocks

Type 4, Square Flange

The Smoot Type 4 takes stainless steel to the next level with complete 304 stainless steel construction.
The Type 4 is designed for mildly corrosive materials while maintaining the legendary Smoot toughness.


  • Corrosion-resistant
  • Housing constructed of 304 stainless steel
  • Open end rotor constructed of 304 stainless steel
  • Outboard bearings with 3 molyurethane U-cup packing rings per side
  • Chain and sprocket drive with guard
  • Supplied with white vinyl closed cell sponge rubber flange gaskets


  • Relieved tips and vane edges
  • High temperature modifications
  • Replaceable stainless steel or urethane tips
  • Reduced capacity rotors
  • Cavity air purge (with closed end rotor only)
  • Zero speed switches
  • Motor mounting brackets
  • Closed end rotors with or without replaceable tips


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